“I think,” he said, “one can get data.  It is clear that while the sun is on this side of the moon the air will be blowing through this planet sponge from the dark side hither.  On this side, at any rate, the air will be expanding and flowing out of the moon caverns into the craters....  Very well, there’s a draught here.”

“So there is.”

“And that means that this is not a dead end; somewhere behind us this cleft goes on and up.  The draught is blowing up, and that is the way we have to go.  If we try to get up any sort of chimney or gully there is, we shall not only get out of these passages where they are hunting for us—­”

“But suppose the gully is too narrow?”

“We’ll come down again.”

“Ssh!” I said suddenly; “what’s that?”

We listened.  At first it was an indistinct murmur, and then one picked out the clang of a gong.  “They must think we are mooncalves,” said I, “to be frightened at that.”

“They’re coming along that passage,” said Cavor.

“They must be.”

“They’ll not think of the cleft.  They’ll go past.”

I listened again for a space.  “This time,” I whispered, “they’re likely to have some sort of weapon.”

Then suddenly I sprang to my feet.  “Good heavens, Cavor!” I cried.  “But they will!  They’ll see the fungi I have been pitching down.  They’ll—­”

I didn’t finish my sentence.  I turned about and made a leap over the fungus tops towards the upper end of the cavity.  I saw that the space turned upward and became a draughty cleft again, ascending to impenetrable darkness.  I was about to clamber up into this, and then with a happy inspiration turned back.

“What are you doing?” asked Cavor.

“Go on!” said I, and went back and got two of the shining fungi, and putting one into the breast pocket of my flannel jacket, so that it stuck out to light our climbing, went back with the other for Cavor.  The noise of the Selenites was now so loud that it seemed they must be already beneath the cleft.  But it might be they would have difficulty in clambering in to it, or might hesitate to ascend it against our possible resistance.  At any rate, we had now the comforting knowledge of the enormous muscular superiority our birth in another planet gave us.  In other minute I was clambering with gigantic vigour after Cavor’s blue-lit heels.

Chapter 17

The Fight in the Cave of the Moon Butchers

I do not know how far we clambered before we came to the grating.  It may be we ascended only a few hundred feet, but at the time it seemed to me we might have hauled and jammed and hopped and wedged ourselves through a mile or more of vertical ascent.  Whenever I recall that time, there comes into my head the heavy clank of our golden chains that followed every movement.  Very soon my knuckles and knees were raw, and I had a bruise on one cheek.  After